Answer
The resultant vector from the tail of vector $a$ to the tip of the third vector $c$ is the resultant vector $a+3c$.
Work Step by Step
To sketch the resultant vector $a+3c$, we can add the tail of vector $c$ to the tip of vector $a$. We can add two more vectors $c$ as shown in the sketch. The resultant vector from the tail of vector $a$ to the tip of the third vector $c$ is the resultant vector $a+3c$.
